Project.* module integration and estimated versus actual time comparison

I plan to follow the code for casetracker integration to provide the same functionality for Project module– providing the total hours on a project. Should we be looking at helper modules and a mini-API?

Or should this totaling be left to views?

I'd then like to have the option to automatically create a CCK field for estimated time for all nodes with node_time_tracker enabled, so that node_time_tracker is aware of it and reports of the difference can be made.

Thoughts?

^{benjamin, Agaric Design Collective}